CCTV footage shows him walking through the town at 3.20am and it's thought he may have tried to walk back to the air base - a three hour journey on foot.

This morning police revealed that analysis of mobile phone data shows that Corrie's phone moved from Bury St Edmunds to Barton Mills on the morning of his disappearance.

After that it appears not to have moved.

Police are exploring the possibility that the phone was lost or discarded, as the timings of its movements appear to coincide with the movements of a bin lorry which travelled between Bury St Edmunds and Barton Mills that morning.

A bin lorry has been seized for examination. The weight of its load is thought to have been around 15kg, so it is not thought Corrie was with the phone.

Searches are being carried out between Bury St Edmunds and Barton Mills.

Continued searches by Suffolk Police, RAF personnel, Suffolk Lowland Search and Rescue, and the National Police Air Service helicopter, and checks in Bury St Edmunds a week after his disappearance have so far revealed no new information.

Police are continuing to appeal for any witnesses who might have information, and have released images of pink Ralph Lauren polo shirt and brown suede Timberland boots that Corrie is thought to have been wearing when he disappeared.

Boots believed to have been worn by missing RAF Honington airman Corrie McKeague when he disappeared

A shirt believed to have been worn by missing RAF Honington airman Corrie McKeague when he disappeared

The missing airman's mother Nicola Urquhart told the Sunday Times that the possibility of a kidnap "has been mentioned by the police and it's not something they would rule out."

She said: "It's looking more and more suspicious as time goes on that they're not actually finding him."

"It [kidnapping] is something that they're thinking of. Obviously it is something they're looking at, but it's certainly not something they're shouting about to me."

A Suffolk Police spokesperson said on Saturday that there was "no evidence of any third party involvement at this stage, however we have to keep an open mind."

Suffolk Police Chief Inspector Simon Mills said: "He is known to go out nights with his friends and go back on foot regardless of distance.

"For him to go missing is abnormal behaviour, but for him, walking back is normal.

"The reason he was reported missing is that he failed to show at work.